The guns are silent. The knives are out.
May 1944. The Third Reich has surrendered, but peace has not come to Europe. In the lawless borderlands of the Alps and the ruined streets of occupied Vienna, a new, deadlier game is being played.
The Dr. Friedrich Ziegler, a Nazi war criminal fleeing justice via the "Ratlines." He carries the "Black Book"—a coded ledger containing the names of high-level Soviet moles embedded in the British and American governments.
The Lieutenant Colonel Mac McAllister and OSS agent Elara Vossen are sent to capture Ziegler before he vanishes. But they aren't the only ones hunting.
The Mac discovers that American Intelligence isn't trying to arrest the Nazi scientist—they are trying to hire him. Caught between a cynical CIA precursor willing to pardon monsters and a ruthlessly efficient Soviet assassin known only as "The Siberian," Mac must navigate a labyrinth of double-crosses where yesterday's enemies are today's partners.
From the sewers of the divided city to the rooftops of the State Opera House, the race is on to expose the traitors before the fragile peace shatters.
In the Twilight War, there are no allies. Only interests.